Philip Covington wrote:
...a big update to jDttSP
along with a GUI very soon on Linux. I think it is a collaboration
between Bob Cowdery, Bob McGwier, and Frank Brickle so I am sure one
of them can tell you more.
That's right. Now that we're past the official fork between the Linux
Edson --
Yipes! I can't thank you enough for pointing this out. We've had a
couple of other reports about problems with the spectum output and have
been going nuts trying to figure out what was going on, because I have
been unable to duplicate the problem.
There was a lengthy process of
Edson --
Thanks for being patient :-)
I am in the process of implementing a stand-alone little machine based
on the VIA EPIA mini-atx mother board and the control application I am
implementing is the first piece of a remote controlled SDR-1000 + little
DSP-dedicated computer.
Wonderful.
Larry Loen wrote:
4. 80 is a must-have. Must be able to do DXCC with this antenna and my
amp. 30 meters I very much wish to have, having never been on the band
in a serious way. If there is an outstanding monobander at 80, I
would definitely consider that.
Gotta get ON4UN's Low Band
Jim Lux wrote:
Which of the two hardware wrappers is the current one in dttsp (the one in
pyhw or pyhw2?)
pyhw2 is the current version. I am informed that there are some
conflicts in the way it's initialized that I have been unable to
duplicate here.
It's supposed to be backward compatible
It's a little sad that there have been some really effective
alternatives to what we now have, and they never caught on.
For example, the worksheet UI in Mathematica (much as I otherwise
dislike that program) is very convenient and flexible. It's pretty
common among Lisps with graphical
Bob --
I'm not saying that VST is directly applicable - but why not this concept
on a modest scale with SDR? We haven't really begun to see the diverse
applications people will put this kind of radio to, given the right
interfaces are present.
We have no disagreement whatsoever about helping
Phil --
Everyone comments on how clear and readable my SSB is over long distances
(300+ miles) with a single 12 element K1FO antenna 30' above ground on 2 Meters.
HINT - HINT
Nag, nag, nag ;-) I know. It's like trying to push water uphill.
Not to worry. I have masts, antennas, a rotor, and
One last comment.
Have a good, long look at gnuradio.
The gnuradio project is simply a first-class piece of work. It embodies
from the ground up the kind of modularity that some are asking for. It's
an experimenter's paradise. It's free. The development tools are free.
The developers
Jim Lux wrote:
Is it? Are the various aspects of the receiver and transmit processing
truly a series of interconnected little boxes with data flowing
continuously through them (in a you can replace a module, without
knowing what's happening in the adjacent modules, recompile, and it
still
Ahti Aintila wrote:
Thanks to Frank for hollering, but why didn't you holler louder?
Honest answer? Because (1) you should choose your battles with care, and
(2) in the end, the Windows version is of no importance to me personally.
Everybody likes to cherry-pick ideas from Fred Brooks. My
Jim Lux wrote:
1) Gosh.. there needs to be SOME documentation of the structure of the
software. Even a readme listing that says what each module does and who
calls what. Sure.. am_demod.c probably does something with demodulating
AM, but you'd never know it from reading the comments.
It's
Jim Lux wrote:
Nonsense... it's never premature to at least describe the intended
structure as you build it.
I'm inclined to believe you haven't actually made any serious attempt to
look at the code.
Don Knuth often has made the point that the chief deficiency in most
programmers'
Sami Aintila wrote:
Nothing to regret, Jim. These things needed to be said.
[Frank Brickle]
Further discussion /dev/null.
Well, this is certainly a helpful attitude.
When these things are brought up in a public fashion, prior to any
private communication or discussion on the subject
Gerald Youngblood wrote:
Yep, the SDR-1000 is not a backpacking rig. Nor is a backpacking rig a
SDR-1000. A fork will never be a knife but you can cut some with a fork if
you push hard enough. Everything has its place.
However, I had fun going mobile with the SDR-1000 on the way to Dayton
ecellison wrote:
NAW! Don't take it private! An occasional 'flame war' sobers or makes us
drunk one way or tother. (That is almost a quote Frank)
You've got my number, Eric. The old Irish question Is this a private
fight, or can anybody join? always seemed like a good way to start a
lyle johnson wrote:
The Pentiums can run circles around these, but due to pipelining and so
forth really like to deal in bathes of audio samples rather than a
sample-at-a-time like the traditional DSPs use, which may be part of the
reason the SDR1K has issues with lag/delay. The DSPs used in
Jim Lux wrote:
Not according to the description I read... 20kHz LPF in front of the A/D
for the Orion.
OK, I was definitely operating under a misconception. Good.
The real advantage of the SDR1K is that the architecture is very open.
Yup. You can even feel the breeze blowing through it
n4hy wrote:
As it stands, you are limited to about 10 Hz accuracy in the freq.
calibration based on the display.
You mean...there's a feature where the SDR1K *isn't* better than my IC-746?
Horrors! That's it! I'm done with this project. What were you guys thinking?
-73
Frank
AB2KT
Larry W8ER wrote:
In case you are a doubting soul, listen to what can be done with a flat
FLEX transmitter as it is:
http://w8er.com/audio/w9ad.mp3
Yow. That is positively scary.
Reassuring, though. We went through a fair amount of soul searching
before deciding to move the input audio
Bob --
This kind of graphical programming has a long and venerable history. If
you have a library with access to the Computer Music Journal, you'll see
that work on this kind of system, for both synthesis and control, is
discussed in articles as far back as the early 70's. There are
As a point of interest, it turns out the FSK generator is a hybrid of
the iambic keyer and the keyboard keyer. It uses a version of the iambic
hardware interface but a version of the keyboard tone generation and
threading. The only really new element is signalling from the outside to
turn the
Jim --
The AudioScience http://www.audioscience.com interfaces (high-quality
stuff aimed at broadcast apps) have Linux drivers. All of their gadgets
have at least 4 playback streams; a number of them have 8 simultaneous
input paths as well. If your computer is up to it I believe you can use
Bob --
Entirely beautiful.
How about PyRad?
73
Frank
AB2KT
[EMAIL PROTECTED] wrote:
I have added a page here
http://myweb.tiscali.co.uk/g3ukb/realisation.htm on progress and a
little info for any who are interested. The whole site needs redoing at
the moment but I will try to keep that
channels.. ASI6244 or
ASI6044 or ASI5042
No idea how much they cost, though.
Frank Brickle wrote:
Jim --
The AudioScience http://www.audioscience.com interfaces
(high-quality stuff aimed at broadcast apps) have Linux drivers. All
of their gadgets have at least 4 playback streams; a number
Unfortunately there is no Linux client for vskype yet.
That notwithstanding, Skype is really excellent. We're using it as our
basic phone service when we're in BC, and it's been nothing but a
delightful surprise how well it works and how little it costs.
Of course it's tough to run the SDR1k
Skype, yes; using it here.
Vskype, no.
73
Frank
AB2KT
Ken N9VV wrote:
http://www.skype.com/products/skype/linux/
SuSe
Fefora
Mandrake
Debian
de Ken
I assume you're running an X server on the cygwin machine.
If you bring up a local xterm, can you ssh in it to the SuSE
machine? If so, what happens if you ssh -X? That should let
you run X clients on the SuSE machine with the cygwin
machine X server as the host.
Frank
[EMAIL PROTECTED]
Philip Covington wrote:
...One interesting thing is that if you just compile
the 2.6 kernel with CONFIG_PREEMPT then it's soft realtime enough that
I would almost say that there is no need for RTAI in the SDR
application. This is a huge change from the last time I played with
these things
[EMAIL PROTECTED] wrote:
2. The setDDSFreq() does not set the frequency although it does set
the band relay. Other commands seem to work ok. I don't have an
RFE board so changed sdr1k-setup.py to reflect that. I can set the
frequency from the Windows Python console fine
Richard Stasiak wrote:
...I think I will have to try SSB now...
Why on earth would you want to do that? After all this work
we put into CW so you could actually use the SDR1K like a
real radio?
;-)
73
Frank
AB2KT
Jim Lux wrote:
Seems that a better way to measure clock accuracy on the sound card is to
generate a sine wave in software and run it out to the (external reference
locked) counter.
The spotting tone function in the DSP will generate a
continuous sine, at an arbitrary frequency, with the
Not sure how the Windows version is working right now, but I
think the audio and DSP buffer sizes are finally
independent. To get the narrow filters you need large DSP
buffers, not audio buffers.
73
Frank
AB2KT
Larry Loen wrote:
I have 3B8FG in my sights, but I might miss. Still haven't
Joe --
The compander in the DSP is a replacement for compression.
The process is calld compansion because it will also do
expansion, therefore com-pression + ex-pansion.
Whether it compresses or expands, and how much of each, are
all controlled by a single parameter.
When the compander is
While adding the new 9-band ISO-center graphic EQ today, I
noticed that the IQ correction had somehow bubbled up to the
wrong place in the TX audio input chain. Doubtless an
artifact of the many ping-pongs of the source code between
Bob and me. Now in its correct place.
73
Frank
AB2KT
Alan
Joe - AB1DO wrote:
1. Is the compander's compression algorithm different from that of the TX
Feed Forward Compressor?
They're completely unrelated.
The feedforward compressor is basically a digital model of
an analog design, I believe based on the example in Frerking.
The compander
ecellison wrote:
Well, I was overstating on the 'banning' discussion, sort of to make a
point...
It's not a bad idea to modulate discussion on this subject,
because most everybody (yours truly!) has strong feelings on
the subject, and it's an easy subject to have opinions about.
The task
BTW, question for anybody who can help.
The compansion function is basically a bounded,
single-quadrant version of
f(x) = (1 - exp(x)) / (1 - exp(alpha))
mirrored into a second quadrant for x 0, for compansion
factor alpha.
This kind of waveshaping is usually analyzed in terms of
n4hy wrote:
...I am going to figure out the best
regression line at the place of maximum slope on this compression
curve. That slope will tell you how much gain is being applied at that
agnitude. If it is 10 dB, I am going to call it 10 dB of
compression...
The only problem I have
Phil --
I'm occupied for the next couple of days, but we could
certainly do it from here. Bob knows the way. Is any time
during the week, especially evenings, convenient for you? If
not, the following weekend is a good possibility.
We could also set up to do some recordings.
73
Frank
AB2KT
n4hy wrote:
You caught me again trying to cheat.
That ain't cheating, it's science, as opposed to
engineering. You tell me the correct answer, I can't do it,
so I do what I can do and call it correct.
Frank
Couple of items.
I switch between CWL and CWU all the time. The nice thing
about LSB injection is that the pitch of a CW signal goes
*up* as you tune *up*. That seems nice and intuitive to me.
However, I also do a fair amount of cross-mode operation (HF
and VHF both) and you need to be able
Gary --
I personally would choose to display a smaller set of buttons for
features I use all the time, like CW controls and one-button memory
dumps to CW or voice (or digital), or just fewer buttons altogether if,
because of my limited operating skill set and interests, they’re
controlling
Phil --
All right, that's great. It's not a real or a permanent
solution, but having multi desktops might be one way to ease
the pain of expanding to a full-screen console.
Also, under Linux, I have several small sticky windows --
things like the jack controls -- that stay in place even
Phil --
I usually get home around 7:30 - 8:00 and monitor 144.200 with the SDR 144.220
with the IC756 Pro2 split off the 2M transverter + 50.125 direct to the 6M5X
while I fill my HD up with all the QA posted here (still have 24 more to read
tonight).
OK, let's give it a shot Monday and/or
Jim Lux wrote:
And an enormously rich set of interfaces both in and out.
Although, I have noticed that there's more and more USB and some sort of
high speed MIDI (people want to dump samples more rapidly).
Yes, USB seems to have made the various MIDI 2 proposals
unnecessary. Thank
All,
The SourceForge CVS problems *appear* to have been fixed.
The latest snapshot should be in sync with the tarball I've
been sending to those who requested it.
When we have ascertained that the problems really are fixed,
we will update CVS with the very latest changes. There are
some
Larry Loen wrote:
It does, however, imply a very different modus operandi. I suspect it
may be a real dividing line. I wonder aloud if this will dictate
whether one is still using the SDR five years from now or not. Given
that it is you in particular, I hope I'm wrong.
I'm afraid I'm not
ecellison wrote:
What might be doubly interesting is looking into taking (e.g. ) gear for
1296 and trying out moonbounce. That's beyond my current capabilities,
but it is something we could dream about and maybe make happen. Or,
maybe something surer like 6 meters during the Leonids or
Dale Boresz wrote:
...I've been using the SDR on
receive and the K2 on transmit for a couple of months, and there's not
much I can't manage to pull through.
FWIW, I've stacked my HW-8 on top of the SDR1K and am
uglying up a little carrier-sense T/R switch to do the same
thing. The Heath
Jobst Vandrey wrote:
1) I plan to run the SDR-1000 on 20 meters only into a 50 ohm antenna...
150 feet of RG-213 coax OR 150 feet of window line with 9:1 baluns at both
ends?
RG-213 has about 0.8dB loss per 100 ft into a 50 ohm load at
14MHz. Add in the connectors and you've got ~2dB. A pair
The new compander shows up in the RX audio chain too, just
before the squelch. It really improves the squelch
performance on CW RX, although it does point up the need to
lengthen the squelch slew rates. There are some occasional
clicks on the releases of high-amplitude CW elements when
the
Dale --
...he has no experience w/ Linux and would prefer to spend
his time with radio work and not getting up to speed with a new
operating system.
With any of the current desktops, particularly KDE, the
learning curve is not steep.
Would the Linux SDR1000 code compile and run on
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